Stoker fuel deflector



Oct. 5, 1937. c, J SURDY STOKER FUEL DEFLECTOR 2 Shee ts-Sheet 1 FiledMarch 22', 1934 INVENTOR. 612/65 (mam/ ATTORNEY.

Oct. 5, 1937. c. J. SURDY ST CKER FUEL DEFLEC TOR 2 Sheets-Sheet 2 FiledMarch 22, 1954 V A V m 2/ A INVENTOR.

Qzar/ea J 51mg? l/III/I/IIIII/l/III/IIII ATTORNEY.

Patented Oct. 5, 1937 UNITED STATES PATENT OFFICE .mesne assignments, toThe Standard Stoker Company, Inc., New York, N. Y., a corporation ofDelaware Application March 22, 1934, Serial No. 716,758

7 Claims. (o1. 110-101) My present invention relates generally to fueldeflectors as employed with mechanical stokers for firing locomotivefurnaces and the like, and it appertains especially to an embodiment ofthe fuel deflectors as disclosed in the United States Letters Patent No.1,947,723, granted February 20, 1934, to Nathan M. Lower.

Accordingly, this invention contemplates the provision of fueldeflectors and means associated therewith for bodily moving thedeflectors longitudinally and transversely of the stoker feed conduit.Where more than one deflector is employed 7 I prefer to arrange theoperating mechanism for independent operation of each deflector.

In carrying out my invention, it is a specific object to provide a pairof upstanding deflectors oppositely disposed one at each side of thedischarge mouth of the stoker, each deflector having a forward vaneportion extending in the direction of the flow of the fuel through theconduit, and having a rearward portion disposed outward- 1y and at anobtuse-angle' from the forward vane portion, each deflector beingmovable independently-of the other obliquely with respect to thevertical medial plane of the stoker conduit, where by the deflectors aremoved across, the stoker discharge conduit to form an expansibleandcontractible mouth therefor, shiftable longitudinally and transverselyof the conduit.

Another object of my invention contemplates the pivotal mounting of theforward vane portion of each deflector with its respective rearwardportion and these pivotally mounted forward vane portions are adjustableindependently of each other so that each deflector, aside from beingbodily movable transversely and longitudinally of the conduit, has aforward vane portion movable about an'upstanding axis, thereby producingfuel deflecting means very flexible in operation to meet the conditionsof firing as the exigencies may require.

These and other objects, such as the operating means for each deflector,and the novel construction of the parts and their relations one withanother will be apparent upon the reading of the following specificationin connection with the accompanying drawings, in which, I

Figure 1 is a fragmentary central verticalsec- ,tion through the rearportion of a locomotive with the stoker fuel conduit in which myinvention is embodied shown in similar section;

Figure 2 is a plan section taken on the line 2-2 of Figure 1; V

55 Figures 3,4,;and 5 are sectional views taken on the line 3--3, line4-4, and line 55, re spectively, of'Figure 2;

Figure 6 is a plan section similar to Figure 2 showing a modification;

Figure 'l is a plan section similar to FiguresZ and 6 showing anothermodification; and

Figure 8 is a sectional view taken on the line 7 8-8 of Figure 7.

Referring-now to .Figures 1 to 5, inclusive, the boiler is shown at),its firebox at II, and the backhead at H having a firing opening I3therethrough. Fuel is delivered to the firebox by suitable stokermechanism, only so much being shown as is necessary to a completeunderstanding of the invention. The stoker mechanism includes a conduitM which leads forwardly from a source of fuel supply and is providedwith a laterally flaring discharge mouth it in communication with thefiring opening it for delivering fuel thereto. Flanges such as I6areprovided at the sides of the conduit M for attaching it to thebackhead l2.

In its bottom, the flared discharge mouth l5 is'recessed or cutaway asat I! to receive the chambered jet table 18 which forms a continuationof the bottom of the conduit [4 and is provided at its forward end withjet openings such as 19. These openings l9 discharge jets of pressurefluid across the distributor plate 20 for projecting the fuel'thereoverto all parts of the firebox. A screw 2! advances the fuel through theconduit l4 and although as illustrated this screw terminates adjacentthe plane of the backhead 52, it is obviousthat it may extend forwardlyinto the firing opening I3 or it may terminate an appreciable distancerearward of the position shown, without departing from the spirit of myinvention.

Instoking devices of the character described and illustrated, it hasbeen found in practice that the conveying screw has a tendency todischarge more fuel to one side of the stoker discharge mouth than tothe other, depending on the direction of the flight windings and alsoupon the direction of rotation. Thus, the fuel stream delivered in frontof the jet openings 19 is of unequal volume sothat more fuel is spreadover one side of the firebox than the other side, causing troublesomefire conditions.

at each side of the stoker conduit and preferably in the flareddischarge mouth l5 thereof. The

deflectors 22, 23 are provided with forward fuel deflecting vaneportions 24,25, and the planithreaded along their respective stems.

' form rearward portions 26, 21, respectively. The forward vane portions24, 25 are disposed substantially in the direction of the flow of fuelthrough the conduit i l,- whileIthe rearward portions 26, 21 extendat'an obtuse. angle from the' respective forward, portions to pointsexterior of a the conduit.

The respective side walls 28, 29 of the conduit I4 at the dischargemouth thereof are provided of assembly, the lateral extensions 32, 33are secured to the respective rearward portions 26, 2'!

by screws such as 45, although if found convenient, theymay be formedintegrally therewith. '-By the construction described, a novel andeffective fueldeflecting system is provided that will deflect thedesired quantities of'fuel to selected portions of the distributingplate 2|], and

V consequently, to the selected or desired portions of the firebox.Thus, should it be necessary to 7 deliver more coal to the left side ofthe firebox,

the fireman turns the nut member 39 ina direction which will cause it tomove outwardly from the side wall 29 of the conduit. This will retractthegrearward portion 21 of the deflector 23, and cause the forward vaneportion 25 thereof to be 7 moved rearwardly and outwardly. 'Ifnecessary,

the nut member 38 may be turned so as to cause the deflector 22 to moveforwardly and inwardly of the mouth portion [5. This changes the courseof the, fuelflow so that a greater quantity of fuel is delivered ontothe left side of the plate 20, and consequently to that side of thefirebox. It will be understood that the deflectors 22, 23 may be movedbodily in various relations to the dis b charge mouth ofthe conduit,forming an expansible and contractible mouth at various pointstransversely and rearward of the fuel discharge edge formed. by thefront face 42 of the chambered jet table l8, To explain the movement ofeach deflector in another way, it maybe said that the free end of eachfuel deflecting portion moves in a plane which is spaced from and parallel to the oblique plane of movement of the rearward portion of eachdeflector. In Figure 6 there is shown a modification of my inventionwherein the rearward portions 26b, 21b of the respective deflectors 22b,23b extend through side walls of the conduitsat an angle to the verticalmedial plane passed through the conduit which is not so acute asthe'corresponding angle shown in Figure 2. By this construction, theforward portions Mb, 25b of the deflectors 22b, 23b, respectively, willhave a greater movement trans- 'versely of the mouth 15 than themovement lon- .gitudinally of the conduit. In the construction shown inFigure 2, the movement longitudinally of the conduit is greater than themovement transversely thereof. However, it will be recognized that theparticular angle is a matter which is governed by the expectedconditions of service. 7

r a In Figures 7 and 8 I have shown another modification of my inventionwherein the forward 7 portions 24a, 25a of deflectors 22a," 23a arepivoted to the rearward portions 26a, 21a. respectively by means ofupstanding pins 50. As clearly shown in Figure 8, the rearward portions26a, 21a

carry the pins 50 having threaded upper ends 5| I By the which areengaged by'thumb nuts 52. use of the pivotal mounting for the forwardvane portions of the deflectors, in conjunction with the otheradjustable feature shown, it is possible to swing each-forward portionabout a pin .50 and also to move. it transverselyand longitudinally ofthe discharge mouth. This construction gives a wider range of control. 1

In order to swing the forward vane portion of a deflector about'its pin56, the thumb nut is loosened to ease the pressure between the adja-.cent faces 53, 54 of the forward and rearward portions, respectively,permitting turning of the forward vane portion. After the forward vaneportion is set atthe desired angle, the thumb nut 52 istightened, toprevent movement of the deflector by the fuel stream.

It will be noted from an inspection of Figures to the fuel conduit, aslight pocket is formed between the includedside wall of the conduit andthe rearward portion of the deflector. However,

these pockets do not offer any resistance to the 2, 6, and 7, andespecially the latter two, that a 7 when a deflector is moved inwardlywith respect flow of fuel through the conduit as it will. be"

clearly understood that the fuel which is lodged in them will merelyremain dormant. Uponretraction of the deflector; the oncoming fuel willi carry this dormant-fuel toward the distributor.

Having described my invention, I claim the following as new and usefulin the art to which the structures pertain,

I claim: 7

1. In'combination, a firebox having a wall with an opening therein astoker feed conduithaving its discharge end communicating with saidfirebox-through said opening, means for advancing fuel through saidconduit, 2. fuel distributor adjacent the discharge end of the conduithaving a face provided with a plurality of jetopenings for discharging apressure fluid propelling blast and including a distributor plateextending forward from said face below said jet openings, a pairofupstanding fuel deflectors oppositely disposed one at each side. of thedischarge end;

of the conduit and positioned to act upon the fuel prior to the actionthereon of the pressure fluid blast, each of said fuel deflectorsincluding a rearward portion and a forward vane portion angularlyrelated with respect to said rearward portion, said rearward portionbeing movable to move said forward portion to intersect the face of thefuel distributor at different points transversely arranged with respectto the firingopening and means for so moving said rearward por 7 tion.

2. In combination, a firebox having a wall with an opening therein, astoker feed conduit having its discharge end communicating with saidfirebox through said opening, means for advancing fuel through'saidconduit, a fuel distributor adjacent the :discharge end of theconduithaving a face provided with a plurality of jet openings fordischarging a pressure fluid propelling blast and including adistributor plate extending forward from said face below said jetopenone at each side of the discharge mouth of the ings, a pair of fueldeflectors oppositely disposed y conduit and positioned to act upon thefuel prior to the action thereon of the pressure fluid blast, each ofsaid fuel deflectors including a rearward portion and a fuel deflectingforward portion pivotally mounted on an upstanding axis with respect tosaid rearward portion, the rearward portion of each deflector beingmounted to extend obliquely with respect to the vertical medial plane ofthe conduit, and means operating each deflector independently of theother for bodily moving the said deflectors and their axeslongitudinally and transversely of the conduit.

3. In combination, a firebox having a wall with an opening therein, astoker feed conduit having a discharge mouth communicating with saidfirebox through said opening, means for advancing fuel through saidconduit, a fuel distributor adjacent the discharge mouth of the conduithaving a face provided with a plurality of jet openings for discharginga pressure fluid fuel propelling blast and including a distributor plateextending forward from said face below said jet openings, a pair ofupstanding fuel deflectors oppositely disposed one at each side of thedischarge mouth of the conduit, each deflector including a forward fueldeflecting vane portion which extends in the direction of the flow offuel through said conduit, and a rearward portion extending angularlywith respect to the forward vane portion toward the adjacent side of theconduit and being mounted to extend obliquely with respect to thevertical medial plane of the conduit, said rearward portion beingmovable to move said forward portion to intersect the face of the fueldistributor at different points transversely arranged with respect tothe firing opening and means for so moving said rearward portion.

4. In combination, a firebox having a wall with an opening therein, astoker feed conduit having a discharge mouth communicating with saidfirebox through said opening, means for advancing fuel through saidconduit, a fuel distributor adjacent the discharge mouth of the conduithaving a face provided with a plurality of jet openings for discharginga pressure fluid fuel propelling blast and including a distributor plateextending forward from said face below said jet openings, a pair ofupstanding fuel deflectors oppositely disposed one at each side of thedischarge mouth of the conduit, each deflector including a, forward fueldeflecting vane portion which extends in the direction of the flow offuel through said conduit, and a rearward portion extending at an obtuseangle from the forward vane portion toward the adjacent side of theconduit and being mounted to extend obliquely with respect to thevertical medial plane of the conduit, said rearward portion beingmovable to move said forward portion to intersect the face of the fueldistributor at different points transversely arranged with respect tosaid firing opening and means for so moving said rearward portion.

5. In combination, a firebox having a wall with an opening therein, astoker feed conduit having a discharge mouth communicating with saidfirebox through said opening, means for advancing fuel through saidconduit, a fuel distributor adjacent the discharge mouth of the conduithaving a face provided with a plurality of jet openings for discharginga pressure fluid fuel propelling blast and including a distributor plateextending forward from said face below said jet openings, a pair ofupstanding fuel deflectors oppositely disposed one at each side of thedischarge mouth of the conduit, each deflector including a forward vaneportion and a rearward portion, the forward portion of each deflectorbeing pivotally mounted on an upstanding axis with its respectiverearward portion and each rearward portion being mounted to extendobliquely with respect to the verticalmedial plane of the conduit, eachforward vane portion being independently adjustable about its upstandingaxis, and means for moving independently the rearward portion of eachdeflector obliquely with respect to the vertical medial plane of theconduit whereby the upstanding axis of each forward'vane portion isshifted longitudinally and transversely of the conduit, said deflectorsforming an expansible and contractible mouth for said conduit shiftablelongitudinally and transversely thereof.

6. In combination, a firebox having a wall with an opening therein, astoker feed conduit having a discharge mouth communicating with saidfirebox through said opening, means for ad vancing fuel through saidconduit, a fuel distributor adjacent the discharge mouth of the conduithaving a face provided with a plurality of jet openings for dischargingapressure fluid fuel propelling blast and including a distributor plateextending forward from said face below said jet openings, a pair ofupstanding fuel deflectors oppositely disposed one at each side of thedischarge mouth of the conduit, each deflector including a forward vaneportion and a rearward portion, the forward vane portion of eachdeflector beingpivotally mounted with its obliquely with respect to thevertical medial plane of the conduit whereby the upstanding axis of eachforward vane portion is shifted longitudinally and transversely of theconduit, said deflectors forming an expansible and contractible mouthfor said conduit shiftablelongitudinally and transversely thereof.

. '7. In combination, a firebox having a wall with an opening therein, astoker feed conduit having its discharge end communicating with saidfirebox through said opening, means for advancing fuel through saidconduit, a fuel distributor adjacent the discharge end of the conduithaving a face provided with a plurality of jet openings for discharging'a pressure fluid propelling blast and including a distributor plateextending for ward from said face below said jet openings, a.

pair of upstanding fuel deflectors oppositely disposed one at each sideof the discharge end of the'conduit and positioned to act upon the fuelv prior to the action thereon of the pressure fluid blast, each of saidfuel deflectors including a rearward portion and a forward vane portion'angularly related with respect to said rearward respective rearwardportion on an upstanding axis disposed rearward of said face and each,

